Anything that is pedantic, trivial, or needlessly time-consuming. Can be used interchangeably with chickenshit.

Boss: OK, I need you to go through this 2,400-page report, and change the phrase "financial adjustment" to "fiscal alteration" each time it appears.
Me: I haven't got time for this Mickey Mouse bullshit.

"Send Fredo off to do this, send Fredo off to do that! Let Fredo take care of some Mickey Mouse nightclub somewhere!" - Fredo Corleone, The Godfather Part II